湖北宜昌第四纪沉积物中铁质重矿物特征对三峡贯通的指示*
由文智1, 向芳2,3, 杨坤美1, 姜月华4, 喻显涛2, 李磊1

Implication of iron rich heavy minerals in Quaternary sediments in Yichang area of Hubei Province for cutting through time of Three Gorges
You Wen-Zhi1, Xiang Fang2,3, Yang Kun-Mei1, Jiang Yue-Hua4, Yu Xian-Tao2, Li Lei1
宜昌地区沉积物及可能母岩样品中铁质重矿物TiO2-Al2O3-MgO图解(底图据 陈光远等,1987 ) a—宜昌地区样品铁质重矿物图解;b—可能母岩中铁质重矿物图解(部分数据来源于 朱俊士,1995 ; 郑文勤等,2014 ; 林浩,2017 )。Ⅰ沉积变质—接触交代趋势区;Ⅱa超基性—基性—中性岩浆岩趋势区; Ⅱb酸性—碱性岩浆岩趋势区;Ⅲ碱性岩浆岩趋势区